You have to be really careful with these specs that manufacturers toss around. It's quite one thing to claim a certain frequency extension, quite another to meet it under proper test conditions.
Also, there was a post about looking at the woofer and predicting bass response. The nature of bass extension is largely a function of woofer size, cabinet size, and whether it it's sealed or ported. These things all have to be optimized properly and, when you do, you get a certain response that's quite easy to predict.
I'd be VERY surprised if either of those speakers could reach those extremes with any real output capability, or without distortion that's through the roof. On the other hand, I'm willing to have that claim challenged -- we have the facilities to test it. Neither manufacturer has submitted their speakers for these tests.
Doug Schneider
www.SoundStageNetwork.com